Gaseous fuel burner



May E29 E936'. w. F, LUKEMEIER GASEOUS FUEL BURNER Filed sept. 5, 1935 Patented May 12, 1936 UNITED STATES PATENT OFFICE Peerless Manufacturing Corporation,

Louisville, Ky., a corporation of Kentucky Application September 5 8 Claims.

This invention relates to gaseous fuel burners, and has generally in View to provide a gaseous fuel burner which is cheap and easy to produce, which is strong and durable, which is exceptionally simple in design and yet highly eiiicient in operation, and which includes means whereby substantially equal amounts of combustible fluid are supplied to the diiierent burner tips thereof so that all of the tips burn substantially uniformly.

According to one practical and preferred embodiment of the invention the burner body is of narrow, elongated form having burner tips distributed substantially throughout the length thereof, and its design is such as to have a cornbustible uid supplied thereto through one end thereof. In this connection a special object of the invention is to. provide means not only to prevent air being drawn into the burner body through the burner tips adjacent to the inlet end of the body by the inflowing combustible iiuid, but to assure that the combustible fluid shall be supplied to such tips, and all of the other tips, substantially uniformly.`

According to a preferred embodiment of the invention, the burner body is provided at its inlet end with means for the supply of gas and air thereto for inter-mixture to form the combustible fluid, and in this connection another special object of the invention is to so form the burner body adjacentto its inlet end as to assure an intimate intermixture of the gas and air and a desired distribution of the mixture to the differentportions of the burner body.

With the foregoing and other objects in view, which will become more fully apparent as the nature of the invention is better understood, the same consists in the novel features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing and dened in the appended claims.

In the drawing, wherein like characters of reference denote corresponding parts in the different Views:

Figure 1 is a top plan view of a burner embodying the features of the invention.

Figure 2 is a central, vertical, longitudinal section through the burner on the line 2 2 of Fig; 1.

Figure 3 is a horizontal section through the burner taken approximately on the line 3 3 of Fig. 2.

Figure 4' is a horizontal section through the 1935, Serial No. 39,352

burner taken approximately on the line 4 4 of Fig. 2; and

Figures 5, 6, and 'l are transverse sections through the burner taken approximately on the lines 5 5, 6 6, and 'I 'I, respectively of Fig. 2.

Referring in detail to the practical embodiment of the invention illustrated in the drawing, A designates, generally, the burner body which is hollow and of narrow, elongated form and which comprises, in the present instance, a top wall IG, side walls il, II, a bottom wall I2, and inner and outer end walls I3 and Ill, respectively.

The outer end wall It closes the outer end of the hollow body A. On the other hand, the inner end wall 53 is provided with a central opening I5, adapted to have aI gas supply pipe connected therewith, and with a plurality of air admission openings IS disposed outwardly of said opening i5 and controlled as to effective air admission area by a valve disk Il rotatably mounted on the body A.

The top wall I preferably, but not necessarily, is continuously flat and straight from end to end of the body A and is pro-vided with a plurality of burner tips I8 distributed along the length thereof. In this connection, in order to prevent the inflowing gas and air from producing an obviously undesirable suction effect through the burner tips which are disposed adjacent to the inner end of the top wall I0, there is provided a baffle plate IS which extends from the inner end of the body A, or from the top wall I!) of said body adjacent to the inner end thereof, inwardly a suitable distance in spaced relationship to the top wall IEl and from side wall to side wall of the body A. The gas and air inlet openings I5 and I5 communicate directly A with the space below said baffle plate and not directly with the space thereabove. Consequently, the iniowing gas and air is prevented by said baille plate I9 from drawing air into the burner body through the burner tips adjacent to the inner end of said burner body.

In the foregoing connection it also is desirable to provide means to cause the inflowing gas and `air to become thoroughly intermixed prior to the same rea'ching the burner tips I8. Accordingly, the side walls I I, II, the bottom wall I2 and the baiile plate I9 all are directed inwardly from the mately in transverse alinement with the outer end of the baffle plate l 9, thereby forming a mixing chamber 2| which is of increasing sectional area outwardly from the throat 20. Thus, the inflowing gas and air are brought intimately together in the constricted throat 20 and at the same time their velocity is increased, and as they enter the chamber beyond said throat they expand Vand have turbulence imparted thereto, resulting in their intimate intermixture. In short, the inner end portion of the body A is of Venturi form and acts as a venturi in imparting turbulence to the inflowing gas and air and in increasing their velocity as well as effecting their intimate intermixture.

From a point adjacent to but beyond the outer end of the chamber 2|, tothe outer end of the body A, said body is formed to include an upper chamber 22 and a lower chamber 23. The upper chamber preferably is of uniform cross sectional area throughout its length and of greater crosssectional area than the lower chamber 23. On the other hand, the lower chamber 23 is of progressively decreasing cross sectional area toward its outer end and preferably is so formed by converging the lower portions of the side walls I I, I I, ofthe body A toward their outer ends.

Flanges 24,V 24 extend inwardly from the side walls II, II at the top of the lower chamber 23 and have their inner or adjacent edges disposed in parallel, spaced relationship to each other. The chambers 22 and 23 thus are in constant and open communication with each other through a passageway which is of uniform width from end to end of said chambers.

Therupper chamber 22 is of approximately the same depth as the space between the top wall I0 and the baffle plate I9, and is alined with said space, whileV the lower chamber 23 preferably is of somewhat less width and depth than the outer end of the chamber 2I and at its inner end is merged into the outer end of said chamber 2I, being disposed in alinement therewith as shown.

At points approximately midway between the ends of the body A are vertically disposed ribs 25 which extend suitable distances inwardly from the side walls II, VII into the upper chamber 22; addition, at the inner end of the chamber 22 are other ribs 26 which preferably are reversely curved as shown and which also extend suitable distances inwardly from the side walls II, I I, respectively.

'I'he operation of the burner is as follows:- Gas and air entering the inner end of the burner body first are intermixed in the 'chamber ZI and then ilow outwardly, in minor amount into the inner end portion of the upper chamber 22 and in maj or amount into the lower chamber 23. Due to the smaller area of the inner end of the lower chamber 23 as compared with the area ofthe outer end of the chamber 2 I, and to the ribs 26, as well as'to the shoulders 2l formed by the mer- Vgence of the side walls II, II of the chamber 2l into the chamber 23, some of the intermixed gas in which connection it is apparent that due to the outwardly decreasing sectional area of the lower 'chamber 23, the flow of the combustible mixture to the burner tips within the length of the chambers 22, 23 is so controlled that all of such burner tips are, or may be, uniformly supplied with fuel. In other words, it is apparent that a burner construction as shown and described will result in some of the combustible fluid being supplied to all of the burner tips, and it is equally apparent that by experimentation the proper convergence of the side walls I I of the chamber 23 and the proper disposition and extent of the ribs 24, 25, 26, etc., may be determined to assure that the fuel will be supplied substantially uniformly to all of the burner tips.

As is manifest, the present burner is of exceptionally simple construction and embodies a design such that it may be cast exceptionally easily and economically. At the same time its design is such that it is inherently strong and unlikely to become broken either during its production or while in service.

Without further description it -is thought that the features and advantages of the invention will be readily apparent to those skilled in the art, and it will of course be understood that changes in the form, proportion and minor details of construction may be resorted to, without departing from the spirit of the invention and scope of the appended claims.

I claimzf 1. A gaseous fuel burner comprising an elongated hollow body having burner tips distributed along the top thereof, means for the supply of combustible fluid into said body at one end thereof, said body being divided into upper and lower chambers, means whereby inflowing combustible fluid is delivered initially in major part into the lower of said chambers and in minor part into the upper of said chambers, said chambers being in communication with each other'throughout'a major portion of the length of the body through an opening which is of uniform width throughout its length, the lower chamber being of progressively decreasing cross sectional area Vtoward the end thereof remote from the combustible fluid inlet end thereof so that fluid is delivered from the lower chamber into the upper chamber in progressively decreasing amount toward the last mentioned end of said chamber.

2. A gaseous fuel burner as set forth in claim 1 including baille means extending transversely of the upper chamber of said hollow body within the same to resist outward flow of the combustible fluid through said upper chamber thereby to cause some of said fluid to be directed to the burner tips adjacent to the iluid inlet end of the hollow body.

3. A gaseous fuel burner comprising an elongated hollow body having burner tips in a wall thereof distributed along the length of the body, means for the supply of gas and air into said body at one end thereof, said body having a gas and air receiving and mixing chamber at said end thereof, a. baille plate extending from said end of said body inwardly a limited distance in spaced relationship to the wall of the body having the burner tips, said baille plateforming one wall of said chamber and said chamber being in communication with the space between said baille plate and the wall of the body having the'burner tips through the body at the inner end of the baille plate, said chamber and said space bothV being in communication at their inner ends with the inner end portion of the hollow body, and flanges-extending inwardly from the Vside walls of the burner body adjacent to and inwardly of the inner end of the space between the baffle plate and the wall having the burner tips to distribute inflowing gas and air substantially uniformly to the burner tips along the length of the inner end portion of the hollow body and to direct some of the gas and air toward the rst mentioned end of the body into the space between the baille plate and the wall of the body having the burner tips.

4. A gaseous fuel burner as set forth in claim 3 in which the gas and air receiving chamber is of Venturi shape.

5. A gaseous fuel burner comprising an elongated hollow body having burner tips distributed along the length of the top wall thereof, means for the supply of combustible fluid into said body at one end thereof, said hollow body having upper and lower chambers in open communication with each other through a space of uniform width extending throughout a major portion of the length of the body, the lower chamber being of progressively decreasing cross-sectional area from its inner to its outer end.

6. A gaseous fuel burner comprising an elongated hollow body having burner tips distributed along the vlength of the top wall thereof, means for the supply of combustible fluid into said body at one end thereof, said hollow body having upper and lower chambers of which the lower chamber is of progressively decreasing width from its inner to its outer end, and flanges extending inwardly from the sides of the body and defining a space therebetween of uniform width affording communication between the upper and lower chambers throughout the length of said chambers.

7. A gaseous fuel burner comprising a elongated hollow body having burner tips distributed along the length of the top wall thereof, means at the inner end of said body for the supply of combustible fluid into said body, a baille plate extending inwardly from said ends of said body a limited distance in spaced relationship to the top and the bottom walls of the body, said baille plate cooperating with the adjacent side walls and the bottom wall of the body to provide a mixing chamber into which is delivered combustible fluid entering the inner end of the body, the side walls of the body beyond the inner end of the baille plate being constricted and curved to direct part of the combustible uid from said chamber upwardly and around the inner end of said baille into the space thereabove, the body beyond said constrictions being in open communication with said chamber andsaid space and being formed to distribute combustible fluid substantially uniformly to the burner tips disposed along the length thereof.

8. A gaseous fuel burner as set forth in claim 7 in which the body beyond the constrictions is divided into lower and upper chambers which are in communication with each other through their 

